Abstract：
:It is well established that GnRH can stimulate the release of LH and FSH in mammals. Two GnRHs have been found in the chicken hypothalamus, cGnRH-I and -II. There is controversy as to whether either peptide can stimulate release of FSH in birds. The present studies compared the ability of cGnRH-I and -II to stimulate the release of FSH and LH in chickens. Lamprey (l) GnRH-III may be a specific-releasing factor for FSH, as it selectively stimulates FSH release in rodents and cattle, and has been detected in the hypothalamus of rodents, sparrows and chickens. Therefore, the ability of lGnRH-III to stimulate LH and FSH release was also examined. In our first experiment, the effects of cGnRH-I and -II were studied using 17-week prepubertal females. Intravenous injection of cGnRH-II at 1 and 10 microg/kg BW significantly increased LH secretion more than did cGnRH-I. Neither peptide significantly increased plasma FSH levels. In our second study, we administered cGnRH-I, -II or lGnRH-III to mature males maintained on a short photoperiod. cGnRH-II was again more potent than cGnRH-I in stimulating LH release, while lGnRH-III produced a modest LH rise. No GnRH peptide provided specific or potent stimulus to FSH secretion, although the high dose of cGnRH-II modestly enhanced FSH levels in the adult male (P < 0.05). Our results are not consistent with the view that lGnRH-III is a specific FSH-releasing hormone across multiple classes of vertebrates. We conclude that the mechanism by which independent release of FSH occurs in chickens remains unresolved.
journal_name
Domest Anim Endocrinoljournal_title
Domestic animal endocrinologyauthors
Proudman JA,Scanes CG,Johannsen SA,Berghman LR,Camp MJdoi
10.1016/j.domaniend.2005.10.002subject
Has Abstractpub_date
2006-08-01 00:00:00pages
141-53issue
2eissn
0739-7240issn
1879-0054pii
S0739-7240(05)00215-8journal_volume
31pub_type
杂志文章abstract：:In the dairy cow, puerperal uterine intra-luminal concentrations of PGE(2) are related to the establishment and severity of uterine infections. Here we evaluated whether the blood concentrations of PGE(2) and the gene transcription profiles of enzymes involved in its synthesis (cyclooxygenase-2 and prostaglandin E syn...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2008.07.001
更新日期：2008-10-01 00:00:00
abstract：:We aimed to elucidate the effects of PGE2 and PGF2α on the in vitro maturation (IVM) of bovine oocytes. First, cumulus-oocyte complexes were matured in the media supplemented with or without PGE2, PGF2α, or PGE2 plus PGF2α for the final 24, 12, or 6 h of culture. Then, the cumulus-oocyte complexes were matured in the ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2020.106447
更新日期：2020-07-01 00:00:00
abstract：:Since its discovery in 1994, leptin, a protein hormone synthesized and secreted by adipose tissue, has been shown to regulate feed intake in several species including sheep and pigs. Although a nimiety of information exists regarding the physiological role of leptin in rodents and humans, the regulation and action of ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0739-7240(01)00120-5
更新日期：2001-11-01 00:00:00
abstract：:Mammary secretions obtained from four groups of sows at parturition and on days 7, 14 and 21 of lactation were defatted and assayed for total protein and insulin-like growth factor-I (IGF-I). Sows (n = 57) represented two breeds (Landrace and Duroc) and two genetic lines (selected for differences in sow productivity i...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(90)90026-v
更新日期：1990-04-01 00:00:00
abstract：:The relationship between in vitro somatotroph function and growth was examined in piglets demonstrating a continuous range of growth characteristics. Twenty barrows were sacrificed at 3 weeks of age for the collection of pituitary tissue and blood. Pituitary cells from each animal were cultured and exposed to vehicle ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(94)90008-6
更新日期：1994-10-01 00:00:00
abstract：:Receptors for LH (LHR) and FSH (FSHR) are expressed in the canine lower urinary tract (LUT). As gonadectomy results in an increase in plasma LH and FSH, the objective of this study was to determine whether there are any differences in the expression of LHR and FSHR in the LUT between intact and gonadectomised dogs. Fo...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2007.09.005
更新日期：2008-05-01 00:00:00
abstract：:The three biologic activities most commonly associated with tumors that produce Humoral Hypercalcemia of Malignancy (HHM) include; 1) adenylate cyclase stimulating activity (PTH-like activity), 2) in vitro bone resorbing activity, and 3) transforming growth factor activity. The canine adenocarcinoma (CAC-8) model of H...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/0739-7240(88)90022-7
更新日期：1988-01-01 00:00:00
abstract：:The GH has a multifaceted role in growth, reproduction, and milk production. Nonsynonymous mutations identified as L153V were observed from GH1 (L) to GH2 (V) with higher genotypic frequency for GH1 being 0.87. GH2 (V) allele was identified as a rare allele and the population followed Hardy-Weinberg equilibrium. LL ho...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2019.106405
更新日期：2020-04-01 00:00:00
abstract：:Dairy cattle are susceptible to heat stress-induced reductions in fertility; however, direct effects of hyperthermia on specific reproductive functions are difficult to determine in vivo. The objective of this experiment was to examine the effect of elevated temperature in vitro on follicular steroidogenesis, to gain ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2005.02.017
更新日期：2005-10-01 00:00:00
abstract：:The effects of increased postruminal supply of casein, corn starch, and soybean oil on plasma concentrations of the gastrointestinal hormones ghrelin and oxyntomodulin (OXM) were investigated. Four mid-lactation Holstein cows were used in a 4 x 4 Latin square. Treatments were continuous abomasal infusions (23 h/d) for...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2009.12.003
更新日期：2010-05-01 00:00:00
abstract：:Remarkable diversity of size and health of offspring exists after normal pregnancies. When pregnancies are complicated by an extrinsic variable such as inappropriate maternal nutrition, birth weight and health of the neonate are substantially affected. The placenta is the organ through which respiratory gases, nutrien...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.domaniend.2004.06.006
更新日期：2004-10-01 00:00:00
abstract：:The physiological regulation of food intake is a critical factor in both the rate at which an animal grows and its reproductive activity. Recently, progress has been made in elucidating a complex system in which insulin, leptin, and neuropeptide Y function to monitor an animal's energy balance and regulate feed intake...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/s0739-7240(97)00028-3
更新日期：1997-09-01 00:00:00
abstract：:Prolonged hyperinsulinemia is thought to be the cause of equine endocrinopathic laminitis, a common and crippling disease of the foot, for which there are no pharmacologic treatments other than pain relief. It has been suggested that insulin causes its effects on the lamellae by activating IGF-1 receptors (IGF-1R), as...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2020.106510
更新日期：2021-01-01 00:00:00
abstract：:Intact (n = 17) and unilaterally hysterectomized-ovariectomized (UHOX, n = 19) gilts were used to study conceptus development and the steroidogenic capability of three regions of the porcine placenta under normal and crowded intrauterine conditions. Gilts were hysterectomized on either Days 30, 50, 70, or 90 of gestat...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(94)00009-p
更新日期：1995-01-01 00:00:00
abstract：:The influence of genetic selection for improved feed conversion (FC) and fast growth (GL) in broiler chickens, on the hepatic growth hormone receptor was investigated as a function of age. Selection for improved feed conversion resulted in lean chickens, whereas selection for fast growth resulted in fat chickens. Grow...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(93)90024-6
更新日期：1993-07-01 00:00:00
abstract：:Sex steroid hormones such as testosterone have widespread effects on brain physiology and function but one of their best characterized effects arguably involves the activation of male sexual behavior. During the past 20 years we have investigated the testosterone control of male sexual behavior in an avian species, th...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0739-7240(03)00046-8
更新日期：2003-07-01 00:00:00
abstract：:The pituitary gland, occupying a central position in the hypothalamo-pituitary thyroidal axis, produces thyrotropin (TSH), which is known to stimulate the thyroid gland to synthetize and release its products, thyroid hormones. TSH is produced by a specific cell population in the pituitary, the so-called thyrotropes. T...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.domaniend.2005.02.008
更新日期：2005-07-01 00:00:00
abstract：:beta-Adrenergic receptor (beta-AR) agonists increase muscle mass and decrease body fat in rodents and livestock. With oral administration, however, the effects of beta1-AR and beta2-AR can be different, depending on the species tested. We tested the effects of clenbuterol, a beta2-AR agonist, and ractopamine, a beta1/...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2003.08.004
更新日期：2004-01-01 00:00:00
abstract：:Satellite cells are the postnatal myogenic cells, as they provide myonuclei to support skeletal muscle hypertrophy and are principal cells responsible for myofiber repair and regeneration. Even though research with satellite cells from meat animals is new, considerable data exist to suggest that these cells are regula...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/0739-7240(95)00062-3
更新日期：1996-03-01 00:00:00
abstract：:The development and function of the immune system is regulated by neuroendocrine factors. Immune function may be divided into adaptive and natural immunity. Adaptive immune responses are driven by specific determinants of the antigen (epitopes), require 5-10 d to fully develop, and show an accelerated or memory respon...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0739-7240(98)00015-0
更新日期：1998-09-01 00:00:00
abstract：:Our objective was to examine the ability of thyroid releasing hormone (TRH) to stimulate not only the release of the thyroid hormones, but also prolactin (PRL) in the female pig. An experiment was conducted to determine the effect of dose and route of administration of TRH on the concentration of PRL and thyroxine (T4...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(90)90035-x
更新日期：1990-07-01 00:00:00
abstract：:We previously reported that maternal overnutrition and obesity (MO) throughout pregnancy and lactation in sheep (MOF0) decreases term fetal pancreatic β-cell numbers and increases perirenal adiposity producing hyperphagia, increased adiposity and insulin resistance in adult female offspring (MOF1) fed ad libitum. Preg...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2017.04.002
更新日期：2017-07-01 00:00:00
abstract：:Measurement of plasma osmolality (Posm) and plasma vasopressin (VP) concentration in response to hypertonicity is regarded as the gold standard for the assessment of VP release in polyuric conditions. Yet the interpretation of the VP curve as a function of Posm may be hampered by the occurrence of VP pulses. To determ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2004.01.007
更新日期：2004-07-01 00:00:00
abstract：:The objective of this experiment was to develop a procedure for immunizing ewes against melatonin that would alter the effects of changing photoperiod on seasonal reproduction and prolactin secretion. Ewes were immunized against human serum albumin (HSA) as controls (n = 9) or a melatonin-human serum albumin conjugate...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/s0739-7240(99)00017-x
更新日期：1999-05-01 00:00:00
abstract：:The aim of this study was to determine the effects of growth hormone (GH) and insulin-like growth factor (IGF)-I on glycerol release and the regulation of IGF-I and IGF-II expression by GH in isolated rainbow trout adipocytes. Cells were also incubated with GH, tumor necrosis factor α (TNFα), or insulin to analyze the...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2014.11.002
更新日期：2015-04-01 00:00:00
abstract：:Sociosexual stimuli have a profound effect on the physiology of all species. Sheep and goats provide an ideal model to study the impact of sociosexual stimuli on the hypothalamic-pituitary-gonadal axis because we can use the robust changes in the pulsatile secretion of luteinizing hormone as a bioassay of gonadotropin...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.domaniend.2012.03.005
更新日期：2012-08-01 00:00:00
abstract：:It has been suggested that there is a shift in steroidogenic pathways of the theca layer from delta 5 to delta 4 during follicular maturation in the chicken ovary. However, the preferred steroid metabolic pathway in the theca and granulosa layers of small and preovulatory follicles has not been identified. Therefore, ...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/s0739-7240(97)00057-x
更新日期：1998-01-01 00:00:00
abstract：:Highly prolific sows often experience peripartum hypophagia, resulting in decreased production rate. Leptin, ghrelin, and resistin are known as feed intake-regulating hormones in many species, but it is yet unknown how feeding strategy and body condition will affect these hormones around parturition in sows. In the pr...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2013.04.003
更新日期：2013-07-01 00:00:00
abstract：:The hormone progesterone is essential for proper embryonic development. The objective of this study was to examine the relationship between recipient serum concentrations of progesterone, at the time of embryo transfer and at conceptus recovery, on conceptus development from in vivo- or in vitro-produced embryos. Embr...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2015.03.004
更新日期：2015-07-01 00:00:00
abstract：:In pigs, luteolytic sensitivity to PGF-2α (=LS) is delayed until d 13 of the estrous cycle. While the control of LS is unknown, it is temporally associated with macrophage (MAC; which secretes tumor necrosis factor [TNF]-α) infiltration into the corpora lutea (CL), and previous studies have shown that TNF-α induces LS...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2019.106426
更新日期：2020-07-01 00:00:00
